# NousResearch/hermes-agent · Fix ambiguous npx cache generation selection bug

## Open now

- 1 issue, 2 PRs open on GitHub.
- #102576: \[Bug\]: Cached npx fast path can execute an arbitrary stale cache generation
- PR #102578: fix(mcp): stop npx cache fast-path from picking an ambiguous generation
- PR #103698: fix(tools): fall back to real npx when multiple cache generations match

A bug was identified where the npx cache fast-path could select an arbitrary or stale cache generation when multiple matches exist. These items address that issue by adding fallback behavior to real npx in ambiguous cases.

## TL;DR

- 3 member(s): 1 open issue(s), 0 closed issue(s), 2 open PR(s), 0 merged PR(s), 0 PR(s) closed without merging.
- No fix has been merged to main; one or more PRs were attempted (see below).
- **Recommended:** review the prior/competing PR(s) below. A fix was attempted but not merged; your case may extend or revive that work.

## Maintainer resolution verdict

- Internal-tracker verdict over this cluster's issue members: `unresolved`. This is distinct from the fix status above. Weigh it yourself.

## How this cluster was grouped

- Link evidence (`STRUCTURAL_SPANNING`): every member is connected by structural evidence: shared changed files, or a closing/superseded reference.
- Pairwise link density `0.67`: the share of member pairs that carry a link, counting a structural link in full and a relevance-only link at 0.36. `1.00` means every pair is linked.

## Open related issues

- #102576: \[Bug\]: Cached npx fast path can execute an arbitrary stale cache generation

## Prior & competing PRs

- **#102578: fix(mcp): stop npx cache fast-path from picking an ambiguous generation**. open
  - maintainer direction: category `superseded_by_pr`; implication `superseded`; refs `6c06f0fb4`
  - files: `tests/tools/test_mcp_npx_cached_bin.py`, `tools/mcp_tool_config.py`
- **#103698: fix(tools): fall back to real npx when multiple cache generations match**. open
  - maintainer direction: category `duplicate_of`; implication `duplicate`; refs `#102578`, `#102576`, `#102578`
  - files: `tests/tools/test_mcp_npx_cached_bin.py`, `tools/mcp_tool_config.py`

## Fix status

- No merged fix on record.
- Subsystem: `mcp`